Quick Answer: What Is Evaporation Class 9?

What is evaporation short answer?

Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure.

Evaporation is a fundamental part of the water cycle and is constantly occurring throughout nature..

How can evaporation be prevented?

Cool the water down or limit its exposure to heat by keeping it in the shade, adding ice or cooling with refrigerated pipes. This lowers the kinetic energy available to the water molecules, which slows the evaporation rate.

What is the importance of evaporation?

Evaporation is defined as the process of liquid changing into vapor. Importance of evaporation is as follows: Perspiration cools our body through evaporation. The evaporation of liquid from the earth helps to keep the air moist and provides moisture to the clouds.

At what temperature does water stop evaporating?

It will evaporate at any temperature from 0 to 100 centigrade. This assumes standard pressures; in other circumstances, the numbers can go lower or higher. Below 0, the water will be frozen and thus cannot evaporate, but it can (and does) sublimate.

How can water evaporation be reduced?

Floating aquatic plants such as water lily, small duckweed, great duckweed and water meal can reduce the evaporation of water reservoirs by preventing the connection between air and the boundary layer of water.

What are the factors affecting evaporation Class 9?

Factors That Affect the EvaporationTemperature: As the temperature increases, the rate of evaporation also increases. … Surface area: As the surface area increases, the rate of evaporation increases. … Humidity: The rate of evaporation decreases with an increase in humidity.More items…

What are 2 examples of evaporation?

13 Everyday Life Examples of EvaporationDrying Clothes under The Sun. One of the most common real-life examples of evaporation is drying of clothes under the sun. … Ironing of Clothes. … Cooling Down of Hot Tea and Other Hot Liquids. … Wet Floors. … Melting of Ice Cubes. … Preparation of Common Salt. … Evaporation of Nail Paint Remover. … Drying of Wet Hair.More items…

What are the four factors of evaporation?

They include:temperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.exposed surface area of the liquid. … presence or absence of other substances in the liquid. … air movement. … concentration of the evaporating substance in the air.

What is evaporation for kids?

Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air. … Water vapor in the air gets cold and changes back into liquid, forming clouds.

What is evaporation explain?

Evaporation is the process by which water changes from a liquid to a gas or vapor. Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor.

What is the difference between evaporation and boiling Class 9?

Evaporation takes place at all temperatures, while boiling occurs at a particular temperature. 2. Evaporation takes place from the surface, whereas the entire liquid boils. … Evaporation can occur using the internal energy of the system, while boiling requires an external source of heat.

What is evaporation rate?

Safety Data Sheets: An evaporation rate is the rate at which a material will vaporize (evaporate, change from liquid to vapor) compared to the rate of vaporization of a specific known material. This quantity is a ratio, therefore it is unitless.

What is condensation in chemistry class 9?

Condensation is the process through which the physical state of matter changes from the gaseous phase into the liquid phase. … When the water in the air comes in contact with a cold surface, it condenses to form water droplets. The opposite of condensation is evaporation reaction.

How does evaporation causes cooling Class 9?

Evaporation causes cooling because the process requires heat energy. The energy is taken away by the molecules when they convert from liquid into gas, and this causes cooling on the original surface.

Does parafilm prevent evaporation?

It prevents evaporation and dissemination of odors, a quality that makes Parafilm invaluable for refrigerated storage of materials. … Gardening – Parafilm can be used as a budding tape to protect buds or wounds from rain or dust. It helps prevent loss of moisture to keep the bud from drying out.

What is evaporation explain with example?

Evaporation is defined as the process of a liquid changing into a gas. An example of evaporation is water turning into steam.

How is evaporation rate calculated?

If you divide the distance by the elapsed time, the result will be the rate of water loss (evaporation). To convert this evaporation rate in to gallons lost over a specific time period, you will need convert the measure into a volume.

How do you explain evaporation to a child?

Evaporation is when a liquid becomes a gas without forming bubbles inside the liquid volume. If bubbles are formed we are talking instead about “boiling”. For example, water left in a bowl will slowly disappear. The water evaporates into water vapor, the gas phase of water.